months. dolan was just a puppy when we started to follow him through the tsa bomb detection program in san antonio, texas. now, he is ready to duty, wearing a vest and carrying on the process. here is nbc tom costello. >> reporter: it was 18 months ago when we first met dolan and his playmates at the boot camp, that trains these noses to sniff out explosives. but something about this puppy made him special. he was the 500th puppy to go through the tsa program. and every dog is named after one of the 3,000 people who died on 9/11. >> i can't even tell you what an honor this is for me. >> reporter: dolan was named after lisa dolan's husband, navy captain bob dolan, who died in the pentagon on 9/11. on the today show, lisa met puppy, dolan, for the first time >> hello, baby. >> reporter: 18 months later, dolan is all grown up. and with his handler, now ready to graduate from the tsa's bomb detection academy. >> good, good, over here. >> reporter: a big day for which lisa and daughter, rebecca, have driven all the way to san antonio. >> hello, baby, do you remember me? >> reporter: so w
